Claws Mail Alternatives

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Mailspring is a mail client for Mac, Windows and Linux.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.

Apps/Evolution - GNOME Wiki!

The Power Email App for busy professionals, like you.

Mailbird is the best email client for Windows 7, 8 and 10

Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).

Starting with version 0.9.8, mu provides an emacs-based e-mail client which uses mu as its back-end: mu4e.

Add forums and commenting to your site. Unlimited posts, users and traffic, for free. Embeddable, styleable and scriptable.

Geary is an email application built for GNOME 3.

Alpine is a fast, easy to use email client that is suitable for both the inexperienced email user...